Cotton gin



Aug. 14, 1923.

G. E EVANS COTTON GIN Original Filed July 18. 1921 Patented Aug. it, 3923.

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COTTON GIN Continuation ofapplication Serial No.

To (all whom it may. concern:

Be it known that'l, GEORGE E. EvANs, a citizen of the United States, residin at l/Vaco,-in the county of h lcLennan and btate of TeX-ass'have, invented certain new and useful Improvements in Cotton Gins, of which the following is a specification.

This invention relates tonew andusei'u-l improvements incotton gins.

In the cotton-gin which has been in common :use for the." past quarter of a century a single cylinder composed of saws spaced substantially .78 inches apart,-is used. These saws project between ribswhich have a sufficient pitch at thepoint where the cotton lint is carried between the same to relieve the'seeds, which fall or slide down the ribs between the saws; Vorking in conjunction with the saw cylinder is a roll box and the seed cotton is fed into this box from the bottom. This box is substantially cylindrical and one side is formed by the ribs which are curvedto conform thereto. The saws revolve thru the ribs and project into the box about one andone-fourth inches.

While this style of single saw cylinder gin has proved effective in ginning short staple cotton in which the fibresrange in length from .80 to one andone-quarter inches, it has never proven effective in'ginning. long staple cotton in' which the fibres range in length from one and onequarter to twoand one-half inches in length. The roll box is approximately twelve inches in diameter and the saws projecting between the ribs, cut into the roll of seed cotton revolving the same and also removing'the lint cotton which is dragged between the ribs and removed therefrom by a brush or air suction. The saws being spaced only about .7 8 inches apart would cut and break the long staple cotton.

The objectof my invention is to provide in conjunction with a roll box a pair of saw cylinders, which are spaced apart and related to the roll box and the ribs thereon in such a manner as to act independently on the roll of seed cotton. A particular object is to arrange the saws of one cyl- 'inder in staggered or alternate relation to those of the other cylinder so that the saws or" one cylinderwill plow difierent channels in the cotton roll from the saws of the other cylinder. By spacing the saws at a greater distance than .78 inches, a longer staple 485,574,.filed July 18, 1821.

Serial No. 582,633.

This application filed. August may be received therebetween. Also the do ble Saw cylinders acting-independently will cause a double action on the roll which will produce a soft, loose and flexible roll.

It is important that each saw cylinder have a separate set of ribs from the other cylinder, with no connection between the saw spaces of one cylinder and the saw spaces oi the other cylinder, or that a solid metal bar be interposed between the sets of ribs. Therefore one of the objects is to separate the saw spaces of one set of ribs from the saw spaces of the other set of ribs so as to prevent a continuous slot from one saw cylinder to the other.

A further object is to increase the efiiciency and capacity of theginanol to operate on the roll without breaking or twisting the same, either ginning long or'short staple cotton.

An important objectis to" arrange the saws so that those of one 'cylinder'do not intermesh or overlap those of the other cylinder and to space the cylinders at a substantial distance from each other by locating cylinders with relation to the roll box and arrange the saw blades of one in staggered relation to the blades or the other cylinder, whereby the lint is properly removed because the staggered relation of the saw blades of the cylinders will act upon the,

periphery of the roll in the same spaced relation as the usual aw cylinder. By this arrangement the longstaple fibres are not engaged with more than one saw simultaneously.

An important advantage resulting from the arrangement of the two saw cylinders is the opportunity to use a short are or shallow depth within the roll box, whereby a loose, sott'and flexible roll, such as is necessary to the most successful ginning, is engendered.

Another object of the invention is to provide means for regulating the revolution of the roll by exerting a tension on the peripherythereor" so as to retard said roll or by relieving said tension to releasesaid roll. Such regulation promotes moreelli'cient ginning.

Where it is desired to recover the seed 7 from the particularbale or batch of cotton ginned, and to assure the planter his own seed, iinmixed with other seed, the invention contemplates the use of an agitator 1n the roll box which agitator is designed to work out of the gin, all of the seed as soon a the gin feeding is stopped. The agitator is not, however, an essential feature of the invention.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is a fragmentary transverse verticalsectional view thru a portion of a gin constructed in accordance with my invention,

Fig. 2 is a partial longitudinal vertical sectional view on the line 2-2 of Fig. 1, and

Fig. 3 is a detail of the roll tension regulator.

In the drawings the numeral 10 designates a roll box. The gin is formed with a huller breast 11, and upper and lower saw cylinder 12 and 13, respectively. A gate 11' controls the admission of cotton to the roll box or diverts it into the huller breast. It is to be understood that the invention is not limited to a hollow gin, but may be used as a plain gin. Each cylinder includes saw blades 14 of the usual type and spacing blocks 15 between the blades. Each cylinder is mounted upon an axial shaft 16 having sgitable bearings (not shown) in a casing 1 I Ribs of suitable formation are provided and the saw blade extend between the ribs 18 into the roll box, the blades of the cylinder 12 being at the top of the box and the bladesof the cylinder 13 at the bottom of the box. As is shown in Fig. 2 the blades of one cylinder are arranged in staggered relation to those of the other cylinder and on centers. It will be noted that for ginning long staple cotton the respective saw blades of a saw cylinder are spaced relatively wide apart as compared with the spacing of the saw of an ordinary gin cylinder, but the saw blades may be spaced in proportion to the lengths of the fibres to beginned. This wide spacing accommodates a long staple and permits the ginning of cotton without the injury incident to the cutting action of closely spaced saws. However it is possible to use ordinary saw spacing with short staple cotton.

By providing two saw cylinder and arranging their blades in staggered relation the roll of cotton in the box 11 is efficiently acted upon. The long staple cotton is not of the lower cylinder not delinting the seed 7 between them and allowing the saws of the upper cylinder more pulling power than if the saw blades were in vertical alineinent.

An adjustable tension bar 25 is hinged on a shaft 26 at the upper ends of the ribs and extends longitudinally of the roll box. The lower edge of the bar i disposed to drag on the roll of cotton and by adjusting the bar, so as to vary its pressure upon the roll, the-revolution of. the latter is more or.

less varied. The density of the roll may thus be controlled. For adjusting the bar a lever 27 is provided at the end of the shaft and engage a retainin segment on the housing 17 as isshown in ig. 3. By swinging the lever the bar is adjusted.

A wind or deflecting board 19 is adjustably mounted between the saw cylinders, while a similar board 20 is mounted below the cylinder 13. Immediately above the cylinder 12 is mounted a curved deflector plate 21, which acts to deflect the sticks, shale and trash into a mote conveyor 22 which is contiguous to a. Wind board 23. It is to be understood that the invention may be applied to either a brush gin or an air blast gin as is disclosed in my co-pending application Serial No. 543,253, and the invention is not limited to either style of gin. In this particular application I have chosen to illustrate a brush gin.

Relatively between the cylinders I mount an ordinary gin brush 24 and below this is mounted a mote board 29 located at the mouth of a lint fine 30 so that the lint removed from the saws by the brush. is direct-- box. This agitator is mounted upon a shaft 32 and includes radially extending fingers and may be rotated in any suitable manner. The agitator causes the discharge of the seed from the roll box during the ginning operation and also completes the dis char 'e of all the seed of a bale before anr other is fed into the'gin. By thismeans, a planter whose cotton 18 being ginned is w en e assured of receiving all of and only his own particular seed, thus a mixture of seed of diiilerent planters is prevented and a par ticular. strain or cotton may be kept pure.

The agitator further provides for cleansing single plate, it is preferable to form the lower set separate form theupperset,

Good results have been accomplished by spacing the centers of the saw cylinders a distance from each other equal to the diam eter. of one ot'thesaws plus the length of the longest fibre to be ginned. Also the saws of both cylinders should be oi substantially the same diameter. This provides an adequate space between the cylinders and permits the saws of each to project into the same roll box in proper order and location. The lower saw cylinder receives the seed cotton from the huller breast and carries it into the roll box wherein it is freed from the lower saws and becomes part of the roll and is then pulled between the ribs and removed by the air suction. a s

It is important that the cylinder center be spaced far enough apart to permit the saw spaces between the lower set of ribs to terminate before entering or approaching the saw spaces between the upper set of ribs,

whereby the upper ribs may be in staggered or alternate relation to the lower ribs with sufficient space therebetween to provide a solid transverse bar or panel of metal between the two sets of ribs. By this arrangement the saws of one cylinder cannot overlap those of another cylinder and a solid obstruction is offered whereby the cotton after having been acted upon in its travel around the roll box. Further the cotton cannot be carried up the saw spaces between the lower ribs and wedged into the saw spaces between the upper ribs.

While this gin is designed to handle long staple cotton it will also handle short and medium staple cotton with greater eiiiciency and rapidity than the present gins, now in COlTlInOIl use.

Various changes in the size and shape of the varions parts as well as modifications and alterations may be made within the scope of the appended claims.

This application is a continuation oi my application, Serial No. 485,574 filed July 18, 1921.

hat I claim is:

1. In a cotton gin, afroll box having curved ribs formin one side thereof, said ribs having an upper set of saw spaces and a lowerset oi saw spaces in staggered relation to the upper spaces, a transverse bar separating the lower spaces from theupper spaces, a saw cylinder having its blades projecting thru the upper saw spaces of the ribs,a second saw. cylinder having its blades projecting thru the lower saw spaces of the ribs, the blades of both saw cylinders projecting into the same roll box, and means for removing lint from the blades of the cylinders.

2. In a cotton grin, roll box having curved ribs forming oneside thereof, said ribshaving an upper set of saw spaces and a lower set of saw spaces entirely separated from the upper set of spaces, said ribs having a continuous transverse bar between their upper and lower saw spaces, a saw cylinder having its blades projecting thru the upper saw spaces otthe ribs, a second saw cylinder having its blades projecting thru the lower saw spaces of the ribs, the blades of both cylinders projecting into the same roll box, and means for removing lint from the blades of the cylinders.

3. In a cotton gin, a roll box having curved ribs forming one side thereof, said ribs having an upper set of saw spaces and a lower set of saw spaces entirely separated from the upper set of spaces, said ribs having a continuous transverse bar between their upper and lower saw spaces, a saw cylinder having its blades projecting thru the upper saw spaces of the ribs, a second saw cylinder having its blades projecting thru the lower saw spaces of the ribs, the blades of both cylinders projecting into the same roll box, and means for removing lint from .the blades of the cylinders, the saw cylinders being spaced a substantial distance from each other and being free from overlapping, the saw blades being spaced relatively wide apart.

4:- In a cotton gin, a roll box, curved ribs forming one side and part of the bottom of said box, the ribs comprising an upper concaved set and a lower concavo-convex set,

the saw spaces between the upper set of ribs being in staggered relation to those of the lower set and free from connection therewith, an upper saw cylinder having its blades projecting thru the saw spaces of the upper set of ribs, a lower saw cylinder having its blades projecting thru the saw spaces of the lower set of ribs, both cylinders having their blades projecting into the same roll box, the upper cylinder blades projecting between the concaved ribs and the lower blades projecting between the concavoconvex ribs, and means for removing lint i from the blades of the cylinders.

5. In a cotton gin. a roll box, curved ribs forming part of said box, a pair of saw cylinders having their blades projecting into said box in staggered relation and being spaced apart at their nearest approach at least the distance oi the length of the longest fibre to be ginned, said saw cylinders act- 10 curved ribs forming one side of the box,

said ribs having an upper set of saw spaces and a lower set of saw spaces in staggered relation to the upper spaces, a transverse bar separating the lower spaces from the upper spaces, a saw cylinder having its blades projecting thru the upper saw spaces or the ribs, a second saw cylinder having its blades projecting thru the lower saw spaces of the ribs, the blades of both saw cylinders projecting into the same roll box, means for removing lint from the blades oi" the c in; ders and anagitator mounted in the roll box relatively'between the saw cylinders.

'7. In a cotton gin, a roll box having curved rib-storming one side thereof, said ribs havin an upper set of sawspaces and a lower set of 'saw'spaces in staggered relation to the upperspaces, a transverse bar separating the lower spaces from the upper spaces, a saw cylinder having its blades projecting thru the upper saw spaces of the ribs, a second saw cylinder having its blades projecting thru the lower saw spaces of the ribs, the blades of both saw cylinders projecting into the same roll box, means for removing lint from the blades of the cylin ders, and a transverse tension bar mounted at the upper side of the roll box.

In testimony whereof I aliix my signature.

GEORGE E. EVANS. 

